People living south of the capital have been urged not to travel altogether and it looks like the same could apply tomorrow, after Southern Rail confirmed disruption will continue until 7am "at the least".

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A major signalling fault at 11.30pm on Wednesday night (July 4) has impacted three separate supplies in the Streatham area, preventing all services from travelling to London Victoria.

Early on Thursday morning train firms took to social media to warn rail passengers of the chaos which was about to ensue.

"You are advised not to travel via London Victoria this morning", tweeted National Rail in capital letters.

Southern Rail tweeted: "Passengers are advised not to travel into London this morning due to total loss of signalling power that Network Rail has experienced on three separate supplies in Streatham area."

"People should not travel," Network Rail simply stated on its website.

Despite engineers working hard to solve the signalling failure overnight, it has been confirmed disruption will continue tomorrow morning.

"We anticipate disruption will continue until at least 07:00 tomorrow morning," Southern Rail has stated on its website.

"We understand that the message of 'do not travel' is not always an option," it added in a Tweet.

"We’re doing everything we can to retain a service whilst Network Rail work to restore power to their signalling system."

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Southern Rail services may be diverted at Crystal Palace resulting in trains not stopping at Balham, Streatham Common, Norbury, Thornton Heath and Selhurst.

Meanwhile Thameslink services between Wimbledon and London have been completely cancelled and all Gatwick Express trains have been suspended.

Despite multiple warnings to not travel to the capital altogether, tickets are being accepted on alternative transport.

Replacement buses are currently running from Oxted and East Grinstead and passengers who insist on travelling are advised to use the London Underground, Metrobus, London Overground, Tramlink and other bus and rail services.

However, warnings are also in place as overcrowding is expected on other lines - a prospect which is not helped by numerous "incidents" also occurring between London Waterloo and Clapham Junction.

"Network Rail is working hard to rectify this fault," said a Govia Thameslink Railway (GTR) spokesman.

"In the meantime passengers are urged not to travel from the south on our remaining services which will be heavily overcrowded."

Southern Rail passengers who were unable to commute due to the disruption are entitled to either a refund or a delay repay, the train company tweeted.

Network Rail has apologised to the thousands of commuters who have been affected by the major disruption.

A spokesman said: "We have had engineers working on site overnight doing all they can to fix the problem. However, we anticipate that the signalling will not be up and running this morning.

"We apologise for the inconvenience caused by the fault and passengers are being advised not to travel with Thameslink, Southern or Gatwick Express from the south into London this morning."

It stated on its website that the "root cause" of the fault was due to failed signalling equipment and a new generator is expected to arrive at the scene "later this morning" before the "situation can be re-assessed".